NEW YORK CITY — JLL has negotiated a 45,000-square-foot, 20-year office lease at 2100 Bartow Ave. in The Bronx. The 180,000-square-foot building was constructed in 1988. Al Gutierrez and Ian Ceppos of JLL represented the landlord, Prestige Properties, in the lease negotiations. Mark Boisi and Stephen Bellwood of Cushman & Wakefield, along with Neil Lipinski of Lipinski Real Estate represented the tenant, United Federation of Teachers. The tenant plans to take occupancy of its new space this fall.